SOLGW Combat Grade Barrels

[HKGuns]

For some reason I can’t seem to find how these barrels are finished inside. Does anyone know if they are chrome lined or nitrided or ???

I have two lightly used barrels with dark lands that look carbon fouled and can’t get them clean.

[ffhounddog]

They are Nitrided.

[HKGuns]

They are Nitrided.

Thanks. Now I know why I can’t get the darkness out of the barrel!

Was driving me NUTZ.

[titsonritz]